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Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

50
Triode
1937

CV2533

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

502A
Thyratron
1948
IO
GL502A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5031
Nixie Tube

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

505AX
Pentode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

506BU
Rectifier FW
1930

CV2645 DW2 R1 S11A U10 UU5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

50A5
Beam Tetrode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

50B5
Beam Tetrode
1946
B7G
A4388

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

50BM8
Triode Pentode

10PL12 UCL82

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

50C5
Pentode

B7G
CV1959 HL92

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

50CD6G
Beam Tetrode
1951
IO

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

50CG
Photocell

3554 4GSM 50CG 868 CE1 CMG32 G8 GS146 NU.1 PJ23 R59A WL735

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

50L6
Beam Tetrode
1941

KT71

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

50L6G
Beam Tetrode
1941
IO
CV2534

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

50L6GT
Beam Tetrode
1941
IO
CV571 KT71

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

50Y6GT
Rectifier FW
1940

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

50Z7G
Rectifier FW
1940

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

51
Tetrode
1936
UY
35 G-51

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

517
Rectifier MV

5557

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5212E
Triode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

527
Triode
1944

3-300G4

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

52CG
Photocell

CMG22 CV248 GS16

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

52KU
Rectifier FW
1949
IO
5AQ4 5V4G 5Z4G CV593 CV1863 GZ32

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

53
Double Triode (Class B)
1936

CV2535

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

53A
Double Triode

3-50D4 CV2536

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

53CG
Photocell

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

53KU
Rectifier FW
1958
IO
CV378 GZ33 GZ37 U54

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

54KU
Rectifier FW

CV593 GZ32

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5458
Voltage Stabiliser

CV1069 NS1 VS69

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5459
Voltage Stabiliser

NS2

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

55
Double Diode Triode
1936
UX6
CV2537

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5544
Thyratron

CV2210 MT5544+D3828

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5545
Thyratron
1958
B4D
CV2215 GL5545 MT5545 XR1-6400

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5550
Ignitron
1946

BK66/5550 GL415 WL681/686

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5551A
Ignitron

BK42/5551A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5651
Voltage Stabiliser

B7G
CV2573

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5552A
Ignitron

BK24/5552A CV2124

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5553B
Ignitron

BK146/5553B

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5554
Ignitron

BK44/5554 CV1742

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5555
Ignitron

BK46/5555

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5556
Triode

UX4
GL5556/PJ8

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5557
Thyratron (Mercury Vapour)

MT17

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5559
Thyratron (Mercury Vapour)

MT57

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5560/FG95
Thyratron

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5586
Magnetron (S-band Pulse)

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5586A
Magnetron (S-band Pulse)

M5083

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

55850
Camera Tube (Videcon)

7038

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

55850F
Camera Tube (Videcon)

P844

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

55850N
Camera Tube (Videcon)

P849

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

55850S
Camera Tube (Videcon)

8541A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5586
Magnetron (S-band Pulse)

CV3611

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

55875
Camera Tubes (Leddicon)

P8000

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

55875B
Camera Tubes (Leddicon)

P8000B

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

55875G
Camera Tubes (Leddicon)

P8000G

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

55875L
Camera Tubes (Leddicon)

P8000R

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

55875R
Camera Tube

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

55A/165M
Double Pentode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

55B/200A
Tetrode (Power)

C1134

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

55B/400A
Tetrode (Power)

C178A/5894

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

55CG
Photocell

CV405

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

56
Triode
1932
UX5
256 A256 C-56 CV611 ER56 G-56 PH256 PH56 VT-56

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

56001
Diode
1960
B8A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5625
Tetrode

ARS6 CV1317

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5632/C3J
Thyratron

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5636
Pentode

CV3928 EF730

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5642
Rectifier HW
1953

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5644
Voltage Stabiliser

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5651
Voltage Reference Tube
1948
B7G
QS1209/5651

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5651WA
Voltage Reference Tube
1948

QS1212

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5654
Pentode
1948
B7G
CV4010 M8100

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5654W
Pentode
1954
B7G
5654 6AK5W

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5655
Image Orthicon
1949

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5656
Double Beam Tetrode
1957
B9A
CK5656 CV2970

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5657
Magnetron (S-band Pulse)

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5670
Double Triode
1952
B9A
2C51 396A CV2831 CV4013

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5670W
Double Triode
1952
B9A
2C51 396A CV2831 CV4013

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5671
Triode (Power)

BR189

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5675
Triode
1954

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5675A
Triode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5675LS
Triode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5676
Triode

CV2239

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5684/C3JA
Thyratron

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5685/C6JA
Thyratron

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5686
Pentode
1952
B9A
CV3612

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5687
Double Triode
1956
B9A
5687WA 5687WB CK5687 CV2578

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5687WA
Double Triode

5687

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5687WB
Double Triode

B9A
5687

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5691
Double Triode

CV3705

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5692
Double Triode
1948
IO

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5693
Pentode
1948
IO
CV3699

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5696
Thyratron

CV3512 EN92

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

57
Pentode
1932
UX6
CV612

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

57.
Thyratron (Mercury Vapour)

BT5

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5702
Pentode

CV3895

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5702WA
Pentode

CV5057

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5703WA
Triode

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5718
Triode
1957
B8D & B8D/F
CV3930 EC71

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5719
Triode

CV4008

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5720
Thyratron (Mercury Vapour)

BT5 CV1147

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5722
Noise Diode
1955
B7G
SD1033

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5725
Pentode
1950

CV4011 M8196

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5726
Double Diode
1952
B7G
6AL5W CV4007 E91AA M8212

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5727
Thyratron

CV4018 M8204

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5728
Thyratron (Mercury Vapour)

BT5 CV1147

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5734
Mechano-Electronic Transducer
1948

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

572B
Triode
1961
UX4
811A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5731
Triode

E1C

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5734
Triode Transducer
1948

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5744
Triode

CV163

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5744WA
Triode

CV163

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5749
Pentode
1951

CV4009

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5750
Heptode
1951
B7G
CV4012

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

575A
Rectifier MV

AH2511

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5751
Double Triode
1953
B9A
CV4017

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

575A
Rectifier HW

ESU400

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5762
Triode (Power)

ACT30 BR191B CV2383 TY6-5000A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5762/7C24
Triode (Power)

CV2383

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5762A
Triode (Power)

CV2383

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5763
Beam Tetrode
1949
B9A
6062 6062 A4541H BR1130 CV2129 M8096 QE03-10 QE03-12 QV03-12

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

577
Rectifier HW

577WA CV3969

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5783
Voltage Stabiliser

CV3933

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5783WA
Voltage Stabiliser

CV3960 CV4066 M8190

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5784
Pentode

CV3896

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5784WA
Pentode

CV5058

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5796
Thyratron

CV3706 XR1-1600

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

57CV
Photocell
1950

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

58
Pentode
1936
UX6
6D6 CV613

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5814
Double Triode

CV4016

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5814A
Double Triode
1954
B9A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5814WA
Double Triode

CV4032

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5820
Camera Tube (Image Orthicon)
1957
5820A/E P807

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5820A
Camera Tube (Image Orthicon)

5820A/E

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5820A/E
Camera Tube (Image Orthicon)

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5820A/L
Camera Tube (Image Orthicon)

5820A/E

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5822A
Ignitron

BK168/5822A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5829
Double Diode

CV3898

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5829WA
Double Diode

CV5059

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5830
Thyratron (Mercury Vapour)

BT69

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5840
Pentode
1957
B8D & B8D/F
CV3929 EF732

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5842
Triode

CV3789

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5852
Rectifier FW

CV3943

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5861
Triode

ME1001

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5866
Triode

B5F
CV1924 TY2-125

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5866A
Triode

CV1924 RS1006B TB2.5/400 TY2-125

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5867
Triode

CV1350+D2168 TY3-250

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5868
Triode
1953

TY4-500

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5869/AGR9950
Thyratron

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5870/AGR9951
Thyratron

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5876
Triode
1964

5876A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5876A
Triode
1964
5876

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5879
Pentode

B9A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5881
Beam Tetrode
1954
IO
6L6WGB 6L6WGC

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5894
Double Beam Tetrode
1955
B7A
5894B AX9903 CV424 QQV06-40 RS1009

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5894/C178A
Double Beam Tetrode
1955

5894A CV2797 QQV06-40A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5894A
Double Beam Tetrode

5894/C178A CV2797 QQV06-40A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5894B
Double Beam Tetrode
1958

CV424 QQE06-40

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5895
Double Beam Tetrode

QQZ04-15

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5899
Pentode
1958
B8D & B8D/F
EF731

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

59
Pentode
1936
UX7
CV2538

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5902
Pentode

B8D & B8D/F
CV4029

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5906
Pentode

CV3931

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5923
Triode (Power)

BW1165

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5924
Triode (Power)

BW1165

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5932
Beam Tetrode
1952
IO
6L6WGA CV3899

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5948
Thyratron (Hydrogen)

CX1140

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5948A
Thyratron (Hydrogen)

CX1140

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5949
Thyratron (Hydrogen)

FX2519A/5949A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5949A
Thyratron (Hydrogen)

FX2519A/5949A

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5954
Camera Tube
1947

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5956
Thyratron (Hydrogen)

FX2517

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5957
Thyratron (Hydrogen)

FX2517

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5957E
Thyratron

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5958/E40
Thyratron (Hydrogen)

FX2513

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5958/E41
Thyratron (Hydrogen)

FX2513

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5963
Double Triode
1954
B9A
CV3900

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5965
Double Triode
1954
B9A
CV5843 E180CC

Type
Structure
Date
Base
PDF
Sensibly equivalent^¶ to:

5977
Triode

CV3932

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